I'd get one just to test this out. Not much to lose for 0.3$ really...
While the price seems good, there's something that makes it seem suspicious to me. I've never seen such a deal including big titles like DayZ Standalone, CoD: Ghosts and Resident Evil 6. Is it actually possible to get those games among others?
If you had access to keys for said games, why not sell them directly for a discounted price since there's so much demand for them? Give me a DayZ standalone key and I'll pay more than 30 cents.